Excavator



` I. PEDERSON.

EXCAVATOR.

APPLICATION FILED ocT. 5. 1920.

1,414,201. Patented l111.2131922.,

3 SHEETS-SHEET I.

www JWN Pfdfqso/J;

J. PEDERSON.

ExcAvAoR. l

APPLICATION FILED OCT. 5, 1920.

1,414,201. Patented Apr. 25, .19221.

3 SHEETS-SHEET 2.

@Il ff I N VEN TOR.

' \ATT0RNEK f3 SHEETS-SHEET 3. In

Patented Apr. 25, 1922.

m EV@ Q mw @l Nawijn :milf r E .HHIMMHUIMMMww: 1Q S n t Z me Q@ w u ,/QN a@ I. PEDERSON.

EXCAVATOR.

APPLICATION FILED o cT. 5. 1920.

1,4t14b201,I

UNITED STATES- lPATENT oFFlcE.

JOHN PEDERSN, OF ZUMBROTA, MINNESO'F. 'I

EXCAVATOR.

This invention relates to grading and ex cavatingmachines of the class for transferring gravel, clay, or the like from a bank or other deposit to a car, wagon or other receptacle, and has for one of its objects to s1 m plify and improve the constructlon, and 1ncrease the efficiency and utility of a device of this character.

Another object of this invention is to produce a device of this character including an apparatus of improved construction which loosens and elevates the material and deposits'on suitable conveying devices whereby it is conducted to the car, wagon or other receptacle.

With these and other objects in view, the invention consists in certain novel features of construction ashereinafter shown and described and then specifically pointed out in the claims, and in the drawings illustrative of the preferred embodiment of the invention. A

Figure 1 is a lan view, partly in section, of the improve apparatus,

Fig. 2 is a longitudinal section on the line 2-2 of Fig. 1,

Fig` 3 is a transverse section on the line 3-3 of Fig. 1.

The improved apparatus includes a supporting frame formed of side rails 10, a rearward transverse member 11, vertical standards 12 at the forward ends of the side rails vand connected at the upper ends by an ele vated transverse member 13.

A rear axle 14 is supported beneath the frame member 1'0 as by suitable hangers 15, and carries traction wheels 16, rotative With the axle. y

A suitable drivin mechanism represented conventionally at 17, is attached to the axle 14 and operative from a suitable motor shaft represented at 18, the motor not being shown as it forms no part of the present invention.

The supportlng frame, likewise includes longitudinal strut members 19, and mounted beneath the strut members is a rock shaft 20. The rock shaft carries crank arms 21 having ground wheels 22 at their ends. The shaft 20 likewise .carries an arm 23 from which a Specification of Letters Patent. Patented Apr, 25, 192.2,

Application illed October 5, 1920.' Serial No. 414,935. i

rod 24 .leads to a operator. v By this arrangement the forward part of the frame may be elevated or depressed vto control .the depth of cut of the excavating mechanism, as hereafter more fully explained. Y

Supported in bearings 25 on' the forward part of the frame members 10, is a relatively point convenient to the heavy shaft 26, which carries coacting head mem ers or .wheels 27. v

Extending between the confronting faces of the members 27 are curved gather plates 28 and each attached near one edge as at 29 to the members 27, leaving the remaining portions of the plates unconnected and slightly yieldable. Any required number of .the plates 28 may be employed, but for the purpose vof illustration, `four -of the plates4 are shown. y

Extending through the members 27 near the attached edge of each of the plates 28, Vis a supporting rod 30, and mounted to swing on each rod is a shovel device comprising a relatively heavy body portion 31 having teeth *32 at one edge. The rods 30 extend through the body portions farther from the toothed edge than from the inner or untoothed edge so that the major portion of the body is in advance of the pivot rod so that the body portions willswing by gravity on the rods.

Each body member 31 is also provided at each end with an outwardly extending roller 33, and attached at 34 at one end to the transverse member 13 are curved guide straps 35 beneath which the rollers contact as the wheels 27 rotate, as hereafter explained. l

The strapsl 35 are eccentric to the wheels 27 and the paths of the members 31 and their, rollers 33, and are formed with lateral extensions 36 .at their lower ends to enable them to be attached to the rail members 10, as shown in Fig. l. y

Attached at their ends respectively to the rail members 10 and struts 19v are other guide strips, one of which is shown at 37, and against the inner faces of which the rollers bear as the wheels are rotated.

The wheel members 27, plates 28 and swin 'ng members 31 constitute an excavating rum, and will be thus referred to hereafter means hereafter described, the members 31 As` the excavating drum is rotated by4 to be discharged.

As the rotation of the drum continues, the rollers 33 consecutively engage the strips 37, thereby causing the further deflection of the buckets and causing them to be withdrawn to a suiieient extent vto pass the slats of the first conveyor device, as here- `aiter explained. As the rollers of the buckets pass the lower ends of the curved guide strips 37, they are caused to assume the position shown at the lower part of Fig. 2, by gravity ready to again act on the material to be excavated.

The plates 28 being unsupported for the major portion of their widths, yield under abnormal strains or pressure, and thus prevent breakage.

Lateral guard members 38 are supported Y' on the strut members 19 and spaced a short distance from the guard straps 35.

Shafts 39, 40 and 41 are mounted for rotation on the rail members 10.

Mounted on the shafts 26 and 41 are interengaging gears 42 and 43. l

The gear 42 also engages with a pinion 44 on the shaft 40, while a gear 45 on the shaft 40 engages with a pinion 46 on the shaft 39.

The shaft 39 also has a pinion 47 on the opposite end engaging withv a gear 48 Aon the shaft 40. The motor shaft 18 is provided with a belt pulley 49 and the shaft 39 is provided with a belt pulley 50, a belt 51 passing around the pulleys 49 and 50, and preferably twisted to secure the requisite direction of motion to the shafts and gears.

Mounted for rotation members are other shafts 52 and 53 carrying drums or rollers 54 and 55 'over which a slatted belt 56 operates. These shafts, drums and belts are enclosed by guard boards 57 and are inclined and constitute conveyor device with the lower end in position to receive the material discharged fromthe buckets.

Mounted on the shaft 41 is a chain pulley 58 while a similar chain pulley 59 is mounted on the extended end of the lower shaft 53 of .the conveyor. By this means motion is imparted to the conveyor.

Disposed transversely of the supporting frame are side boards 61, parts of the .Side

boards extending horizontally l below the line 'of the frame and the remaining portion inclined outwardly and upwardly away from the frame, as shown in Fig. 3.

A shaft 62is .supported in the horizontal portions of the guide boards and carries a belt drum 63 while a similar shaft 64 eX- tends transversely of the guide boards at the opposite ends and carries a belt drum 65.

A belt 66 passes-around the drums 63 and 65 and is provided with flight members 67 spaced at suitable distances.

The shaft 64 is journalled at the ends in plates 68 each having a longitudinal slot 69 through which clamp bolts 70 pass and into the side boards 61. By this means simply constructed tension devices are constructed whereby the tension of the belt 66 is maintained.

Mounted upon the shaft 40 is a bevel pin-- ion 71 engaginga like bevel pinion 72 on an obliquely supported shaft 73, the latter likewise carrying a bevel pinion 74 at its lower end engagmg a bevel pinion 7 5. on the shaft 62.

By this means the motion of the shaft 40 and against the plates 28 and carried over the drum and deposited on the conveyor belt 56 and thence to the elevator belt 66 and thence discharged in a suitable receptacle, not shown.

I claim: l

1. In an excavating apparatus, a drum mounted for rotation and comprising spaced ends and segmental plates connecting the ends, the confronting edges of said plates being in' spaced relation, a shovel member pivoted at one side of the center within each of said spaces and swinging freely therein, saidsegmental plates cooperating with the bucket `members to support the load while being carried over the drum means for rotating said between the frame drum, and means for consecutively disposing -said -shovel devices in discharging position.

2. In an excavating apparatus, a drum mounted for rotation .and including spaced ends, and segmental plates in spaced relation extending between said ends and attached at one' edge only thereto leaving the charging position by the rotation of the drum. 3. In an excavating apparatus, a drum isov mounted for rotation and including spaced ends and segmental plates inspaced relation extending between said' ends, shovel devices coacting with the segmental plates and extending between said drum ends and swingingly connected thereto, stop rollers carried by said shovel devices, means for rotatin said drum, stationary guide strips dispose in the paths of said rollers, whereby the hereto.

JOHN PEDERSON. 

